AU381931A - R. f Improvements in or relating to methods of and apparatus for recording sound andin sound records - Google Patents

R. f Improvements in or relating to methods of and apparatus for recording sound andin sound records

Info

Publication number
AU381931A
AU381931A AU3819/31A AU381931A AU381931A AU 381931 A AU381931 A AU 381931A AU 3819/31 A AU3819/31 A AU 3819/31A AU 381931 A AU381931 A AU 381931A AU 381931 A AU381931 A AU 381931A
Authority
AU
Australia
Prior art keywords
sound
andin
relating
methods
records
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU3819/31A
Inventor
Charles Avent Harold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
Filing date
Publication date
Publication of AU381931A publication Critical patent/AU381931A/en
Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc
Expired legal-status Critical Current

Links

AU3819/31A 1993-12-08 R. f Improvements in or relating to methods of and apparatus for recording sound andin sound records Expired AU381931A (en)

Publications (1)

Publication Number Publication Date
AU381931A true AU381931A (en) 1932-12-15

Family

ID=

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